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CN-224232883-U - Battery monomer, battery device and electric equipment

CN224232883UCN 224232883 UCN224232883 UCN 224232883UCN-224232883-U

Abstract

The application provides a battery unit, a battery device and electric equipment, wherein the battery unit comprises a shell and an electrode assembly, the shell is provided with an accommodating space, the electrode assembly is positioned in the accommodating space, the electrode assembly comprises a first pole piece, a second pole piece and an isolating film, the isolating film is clamped between the first pole piece and the second pole piece, the first pole piece, the isolating film and the second pole piece are wound to form the electrode assembly, the first pole piece is provided with a plurality of first tabs which are arranged in a stacked manner, the plurality of first tabs comprise a first inner tab and a first outer tab, the first inner tab is closer to the winding center of the electrode assembly than the first outer tab, a plurality of first tabs are arranged between the first inner tab and the first outer tab, and the width of any one of the first tabs positioned between the first inner tab and the first outer tab is smaller than or equal to the width of the first inner tab and larger than the width of the first outer tab. The application can improve the yield of the battery monomer.

Inventors

  • NIU ZHUANGZHUANG

Assignees

  • 江苏时代新能源科技有限公司

Dates

Publication Date
20260512
Application Date
20250401

Claims (14)

  1. 1. A battery cell, comprising: A housing having an accommodation space; The electrode assembly is positioned in the accommodating space, the electrode assembly comprises a first pole piece, a second pole piece and an isolating film, the isolating film is clamped between the first pole piece and the second pole piece, the first pole piece, the isolating film and the second pole piece are wound to form the electrode assembly, the first pole piece is provided with a plurality of first pole lugs which are arranged in a stacked manner, the plurality of first pole lugs comprise a first inner pole lug and a first outer pole lug, the first inner pole lug is closer to the winding center of the electrode assembly than the first outer pole lug, a plurality of first pole lugs are arranged between the first inner pole lug and the first outer pole lug, The width of the first inner tab is larger than that of the first outer tab, and the width of any one of the first tabs located between the first inner tab and the first outer tab is smaller than or equal to that of the first inner tab and larger than that of the first outer tab.
  2. 2. The battery cell of claim 1, wherein the plurality of first tabs located between the first inner tab and the first outer tab comprises a first set of tabs and a second set of tabs located between the first set of tabs and the first outer tab, the first set of tabs comprises a plurality of first tabs having the same width, the second set of tabs comprises at least two of the first tabs, and the width of any one of the first tabs in the second set of tabs is less than the width of any one of the first tabs in the first set of tabs.
  3. 3. The battery cell of claim 2, wherein in the second set of tabs, the widths of the plurality of first tabs decrease one by one in a direction from the first inner tab to the first outer tab.
  4. 4. The battery cell of claim 3, wherein in the second set of tabs, the widths of the plurality of first tabs are arranged in an arithmetic progression from the first inner tab to the first outer tab.
  5. 5. The battery cell of claim 2, wherein at least a portion of the first tabs in the second set of tabs are divided into a plurality of subgroups, the first tabs of each subgroup comprising a plurality of the first tabs having the same width, the widths of the first tabs of the plurality of subgroups decreasing in sequence from the first inner tab to the first outer tab.
  6. 6. The battery cell of claim 5, wherein the widths of the first tabs of the plurality of subgroups are arranged in an arithmetic progression from the first inner tab to the first outer tab.
  7. 7. The battery cell according to any one of claims 1 to 6, wherein the second tab is provided with a plurality of second tabs stacked in a direction opposite to the first tab, the plurality of second tabs including a second inner tab and a second outer tab, the second inner tab being closer to a winding center of the electrode assembly than the second outer tab, the plurality of second tabs being provided between the second inner tab and the second outer tab, The width of the second inner tab is greater than the width of the second outer tab, and the width of any one of the second tabs located between the second inner tabs and between the second outer tabs is smaller than or equal to the width of the second inner tab and greater than the width of the second outer tab.
  8. 8. The battery cell of claim 7, wherein a plurality of the first tabs and a plurality of the second tabs are located at the same end of the electrode assembly.
  9. 9. The battery cell according to claim 8, wherein the plurality of first tabs and the plurality of second tabs are each located on the same side of the winding center in the thickness direction of the electrode assembly.
  10. 10. The battery cell of any one of claims 1-6, wherein the first inner tab has a width L1 and the first outer tab has a width L2, the L1 and L2 satisfying 3/4 +.l 2/L1<1.
  11. 11. The battery cell of claim 10, wherein L1 and L2 satisfy 3/4≤L2/L1≤7/8.
  12. 12. The battery cell of any one of claims 1-6, wherein the first inner tab is the first tab closest to the winding center and/or the first outer tab is the first tab furthest from the winding center.
  13. 13. A battery device comprising a battery cell according to any one of claims 1-12.
  14. 14. A powered device comprising a battery cell according to any one of claims 1-12 or a battery arrangement according to claim 13, the battery cell being adapted to provide electrical energy or to store electrical energy.

Description

Battery monomer, battery device and electric equipment Technical Field The application relates to the technical field of batteries, and in particular relates to a battery cell, a battery device and electric equipment. Background Battery cells are widely used in electronic devices such as cellular phones, notebook computers, battery cars, electric vehicles, electric airplanes, electric ships, electric toy vehicles, electric toy ships, electric toy airplanes, electric tools, and the like. In the development of battery technology, how to improve the yield of battery cells is one research direction in battery technology. Disclosure of utility model The application provides a battery monomer, a battery device and electric equipment, which can improve the yield of the battery monomer. The embodiment of the application provides a battery monomer, which comprises a shell and an electrode assembly, wherein the shell is provided with an accommodating space, the electrode assembly is positioned in the accommodating space, the electrode assembly comprises a first pole piece, a second pole piece and an isolating film, the isolating film is clamped between the first pole piece and the second pole piece, the first pole piece, the isolating film and the second pole piece are wound to form the electrode assembly, the first pole piece is provided with a plurality of first tabs which are arranged in a stacked manner, the plurality of first tabs comprise a first inner tab and a first outer tab, the first inner tab is closer to the winding center of the electrode assembly than the first outer tab, and a plurality of first tabs are arranged between the first inner tab and the first outer tab, wherein the width of any one of the first tabs positioned between the first inner tab and the first outer tab is smaller than or equal to the width of the first inner tab and larger than the width of the first outer tab. In the above technical scheme, the width of the first inner tab is set to be greater than the width of the first outer tab, and the width of any one of the first tabs between the first inner tab and the first outer tab is smaller than or equal to the width of the first inner tab and greater than the width of the first outer tab, so that the width of the first outer tab is smaller, the possibility of dislocation with the first inner tab in the thickness direction of the electrode assembly is reduced, and the problem that assembly of the first tab and other parts (such as lower plastic) in the battery is failed due to dislocation is solved, the reject ratio of the electrode assembly is reduced, and the yield and the production efficiency of the battery are improved. In some embodiments, the plurality of first tabs between the first inner tab and the first outer tab includes a first set of tabs and a second set of tabs between the first set of tabs and the first outer tab, the first set of tabs includes a plurality of first tabs having the same width, the second set of tabs includes at least two first tabs, and the width of any one of the second set of tabs is less than the width of any one of the first set of tabs. In the above technical scheme, set up first group's utmost point ear for including the same first utmost point ear of a plurality of widths, then the first utmost point ear of a plurality of range upon range of settings can have great overlapping area, makes things convenient for first utmost point ear and other parts to be connected, and less to the overflow ability influence of first utmost point ear, alleviates the problem of generating heat. In some embodiments, in the second set of tabs, the widths of the plurality of first tabs decrease one by one in a direction from the first inner tab to the first outer tab. In the above technical scheme, the widths of the plurality of first tabs are reduced one by one, so that the widths of the first outer tabs and the first tabs adjacent to the first outer tabs are smaller, the possibility that the first tabs and the first inner tabs, which lean on the outer ring after being wound, are misplaced in the thickness direction of the electrode assembly is further reduced, the reject ratio of the electrode assembly is reduced, and the yield and the production efficiency of the battery are improved. In some embodiments, in the second set of tabs, the widths of the plurality of first tabs are arranged in an arithmetic progression from the first inner tab to the first outer tab. In the technical scheme, the change of the position of the first tab of the second group of tabs is convenient to control after the first tab is affected by the thickness, the possibility of dislocation is reduced, the reject ratio of the electrode assembly is reduced, and the yield and the production efficiency of the battery cells are improved. In some embodiments, at least a portion of the first tabs in the second set of tabs are divided into a plurality of subgroups, the first tabs of each subgroup inc